“…[3] for additional references). When associated with multivariate data analysis (MDA) [35][36][37][38][39][40], vibrational spectroscopic techniques (IR, NIR, and Raman) [1,[35][36][37] have proven to be powerful tools in the analysis of a variety of fuel samples, including gasoline, diesel, alcohol fuel (ethanol-gasoline mixtures [41,42]), and kerosene (jet fuel) [43]. Vibrational spectroscopic techniques are faster than the usual (ASTM) techniques in the analysis of petroleum refining and petrochemical products [22,23,44,45]; in addition, these methods demonstrate good accuracy and precision, are non-destructive, and can be used in remote quality control [3,12].…”